The present disclosure relates generally to oral health products, such as electric toothbrushes. In one example, the electric toothbrush includes a housing, an output shaft positioned within and extending out of the housing, a magnetic assembly positioned within the housing and configured to impart an oscillation motion to the output shaft, and a spring positioned within the housing. The spring includes a first end non-rotatably coupled to the housing and a second end non-rotatably coupled to the output shaft, such that the spring twists as the magnetic assembly oscillates the output shaft to amplify the oscillation motion of the output shaft generated by the magnetic assembly.

A toothbrush with fluid directing drive assembly is provided. The toothbrush may include a handle including an end surface, a brush shaft extending from the end surface of the handle, a drive assembly positioned within the handle and causing the brush shaft to oscillate upon actuation of a motor, a brush tip removably coupled to the brush shaft and positioned adjacent to the end surface of the handle, and a fluid passage defined within the drive assembly within the handle. The brush tip may include a fluid conduit therein. Oscillation of the brush shaft may cause the entire brush tip to oscillate correspondingly. Fluid may be transported through the drive assembly and to the fluid conduit of the brush tip by the fluid passage.

A spring mechanism for attaching to a power device drive unit includes a housing connectable to a portion of the power device and a shaft extending through the housing. One end of the shaft is coupled to a workpiece and a bottom member extends from the other end and is positioned adjacent the drive unit. The bottom member includes at least one of a ferromagnetic material and a permanent magnet. The bottom member, shaft and workpiece move upon actuation of the drive unit, and a spring extends laterally outwardly from the shaft between the shaft and the housing. The spring is affixed to one of the shaft and the housing, wherein the spring bends between a deformed position and a return position upon the movement of the bottom member.

An electric toothbrush includes a main body, a head connected to the main body, having a stem and a rotating element rotating in first and second rotation directions, a transmission shaft rotating the rotating element, a motor generating rotary motion transmitted via transmission shaft to the rotating element, and first, second and third push switches. Pressing the first switch, which is pressed when the transmission shaft is inclined in a first flexion direction, causes rotation of the rotating element in the first rotation direction. Pressing the second switch, which is pressed when the transmission shaft is inclined in a second flexion direction, causes rotation of the rotating element in the second rotation direction. Pressing the third switch, which is pressed by the transmission shaft when inclined with respect to the main body in a third flexion direction, causes rotation of the rotating element in the first or second rotation direction.

Described herein is an oral care implement that includes a head portion; a cup member extending from a front surface of the head portion along a first axis, the elastomeric cup member comprising: a top surface; a plurality of grooves formed into the top surface; a plurality of rib members, wherein adjacent ones of the grooves are separated by one of the rib members, each of the rib members extending along a rib axis that extends radially outward from the first axis, and wherein each of the rib members has a thickness that increases with distance from the first axis. The cup member may comprise a plurality of first grooves and a plurality of second grooves, and wherein each of the first grooves has a first transverse cross-section and each of the second grooves has a second transverse cross-section, the first and second transverse cross-sections being different from one another.

A drivetrain assembly (100, 200) for a personal care device (10), the drivetrain assembly including a resonator (110) connected to a transmission component (24) configured to transmit oscillations to the removable attachment; and a drive coil (120) configured to oscillate the resonator in a first direction; where the drive coil is configured to generate an installation or removal signal in response to installation or removal of the removable attachment, the installation or removal of the removable attachment generating movement of the resonator in a second direction; and where the drivetrain assembly is configured to communicate the generated signal to a controller.

An electric apparatus unit comprises electric apparatus and charging stand. Electric apparatus includes rechargeable battery, a driver that drives through electric power supplied from rechargeable battery and power receiver that supplies the electric power to rechargeable battery. Charging stand includes power transmission coil that supplies electric power to power receiver and support that supports electric apparatus.

The present invention relates to a rotating electric toothbrush comprising: a main body having a receiving space formed therein, a driving means received in the interior of the main body and providing a rotational force, a toothbrush handle having one end detachably coupled to the driving means, and receiving a rotational force of the driving means to be rotated, a support means coupled to the outer peripheral surface of the other end of the toothbrush handle and having plate-shaped support bodies made of a ductile material and radially formed to be spaced apart from each other, and a plurality of toothbrush bristles implanted between the support bodies. The present invention has a structure in which the toothbrush bristles are radially implanted on the outer peripheral surface of the end of the cylindrical rotating toothbrush handle, thereby removing food leftovers sandwiched on a tooth surface or at an interdental gap without damage of gums, and more surely removing dental plaque from the tooth surface due to silicon bristles implanted between the toothbrush bristles. Further, the silicon bristles implanted between the toothbrush bristles support the toothbrush bristles, thereby preventing deformation of the toothbrush bristles, and a space for receiving toothpaste is formed between the silicon bristles, thereby preventing the toothpaste from easily slipping off. Further, a tongue cleaner, which is detachable and made of a silicon material, is further comprised, thereby easily cleaning a tongue.

A personal care appliance (10) comprises a handle (12), an attachment (14), and a controller (16). The handle (12) includes an actuator (20) and drive shaft (22). The attachment (14) has a body (30) with a principal axis (32) extending between a proximal end and a distal end thereof, wherein the proximal end couples to the drive shaft. The attachment (14) further includes a mass-spring identifiable assembly (40) having at least one identifiable resonant frequency in response to a given excitation, wherein the at least one identifiable resonant frequency comprises a resonant frequency selected from at least two different resonant frequencies. The controller (16) is configured to control the attachment (14), via the actuator (20), over a predefined range of frequencies that includes the given excitation. The controller (16) is further configured, in at least a detection mode, to uniquely recognize the attachment (14) via detecting a presence of the at least one identifiable resonant frequency of the mass-spring identifiable assembly (40) of the attachment (14) in response to the given excitation.

Provided is an actuator that has a simple configuration and can stably achieve high output. This actuator has: a movable body provided with a cylindrical magnet section alternately having N-pole faces and S-pole faces on a peripheral surface thereof along the circumferential direction; a fixed body provided with pole tooth surfaces disposed facing the peripheral surface a magnet section and a coil that excites the pole tooth sections; and a spring material holds the movable body to the fixed body in a freely movable manner. The spring material is fixed to at least one of the movable body and the fixed body via a joint section. The joint section has a fixing part for fixing and end section of the spring material, and a stress relaxation part that is disposed in proximity to the fixing part and relaxes stress generated during deformation of the spring material.