A toothbrush comprising a drive mechanism and electronic circuitry configured to drive the drive mechanism to execute toothbrushing motions is disclosed. The electronic circuitry comprises a drive circuitry and a controller which is configured to form a drive signal to operate the drive circuitry to generate drive current. The drive signal comprises a plurality of signal packets, wherein a signal packet has a signal packet duration and comprises a train of switching signals. The switching signals are configured to repeatedly switch on and switch off drive current supply to the drive mechanism at a switching frequency f.sub.s. The signal packet duration is configured to define a rhythm of toothbrushing motions.

The disclosure provides an ionic toothbrush having an elongated body that may be configured to have a one-piece design, or alternatively one or more components of the ionic toothbrush may be removable and/or replaceable. In some embodiments, the present disclosure provides an ionic toothbrush which includes a handle portion, a brush head portion including a plurality of bristle tufts; and an electrical circuit configured to transmit a negative electrical charge through at least a portion of the brush head, wherein the electrical circuit includes one or more sections of conductive resin present on an outer surface of one or both of the handle portion and the brush head portion.

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.

An electric toothbrush handpiece having at least one interface for coupling to a brush attachment, at least one housing, at least one drive unit for driving the interface, which is received in the housing, and at least one energy store for supplying energy to the drive unit. The electric toothbrush handpiece includes at least one fix frame unit which is arranged in the housing and which is implemented as a single piece and which at least partially receives the drive unit and the energy store, wherein the frame unit forms multiple receptacle regions at least for the drive unit and the energy store, which receptacle regions are positioned in a defined manner relative to one another in particular both in an assembled state and in an unassembled state of the frame unit, wherein the frame unit extends axially over the entire drive unit and the entire energy store.

A dual-purpose electric toothbrush head is provided and includes a toothbrush handle and a toothbrush head. The toothbrush head includes toothbrush bristles, and a nozzle and a water trough are disposed in the toothbrush head. The nozzle is connected to the water trough, and the toothbrush handle has a water inlet chamber. A water inlet hole is provided between the water inlet chamber and the water trough. A tail plug is provided on a toothbrush head tail end. The dual-purpose electric toothbrush head can not only clean teeth, but also rinse diastema and oral cavity to ensure oral hygiene. The dual-purpose electric toothbrush has diverse functions, and is stable and convenient to use, safe and reliable.

An oral care device attachment for being coupled to an oral care device handle having an essentially cylindrical drive shaft coupling end. The attachment has an outer attachment tube having a coupling end for being detachably secured at a housing of the device handle. A carrier is mounted for driven motion at the outer attachment tube. A motion transmitter is disposed inside the outer attachment tube and has a first end coupled with the carrier and a second end arranged for coupling with the essentially cylindrical drive shaft coupling end. The second end has a coupling unit having a top plate and at least one at least partly deformable and essentially cylindrical wall element extending from the top plate, or at least two elastic or deflectable wall elements extending from the top plate, respectively. Each of the elastic or deflectable wall elements extends over a portion of a virtual receiver cylinder, so that an essentially cylindrical receiver receptacle is defined by the top plate and the one at least partly deformable essentially cylindrical wall element or by the top plate and the at least two elastic or deflectable wall elements.

A replacement toothbrush head assembly is provided for an electric toothbrush. The replacement toothbrush head assembly is provided in the form of an assembly that includes a head portion and a stem portion, such that the head portion may be selectively and easily attached and detached from the stem portion. The head includes a plurality of bristles extending from a main body having a coupling portion. The stem includes a corresponding locking portion configured to receive the coupling portion, such that the head is releasably coupled to the stem in an assembled condition.

An attachment brush part for an electrical body care brush, in particular an electrical toothbrush, includes brush head with an in particular circular bristle carrier, on which a bristle field with a plurality of bristle bundles each with a plurality of care bristles is arranged.

The present disclosure provides a rotation type electric toothbrush. The electric toothbrush includes a brush handle module, a vibration module and a brush head module having a brush base, a brush cover and bristles. The brush cover and the brush base are in a detachable connection. The bristles are disposed on the brush base. The brush base includes a groove. The vibration module includes a motor and an eccentric shaft having a transmission connection with the motor. The eccentric shaft inserts into the groove. When the rotation type electric toothbrush is working, the eccentric shaft rotates eccentrically to contact a side surface of the groove, so as to drive the brush base and the brush cover to have a reciprocating rotation synchronously.

A personal hygiene device has a drive unit having a support, a stator fixedly mounted at the support, and an armature spring-mounted at the support for driven linear oscillating motion along a first longitudinal direction parallel to or coinciding with an x-axis of an x-y-z coordinate system. The armature has a center of gravity located in rest at a coordinate [x.sub.a, y.sub.a, z.sub.a], and a drive shaft fixedly coupled with the armature and having a center of gravity located in rest at a coordinate [x.sub.d, y.sub.d, z.sub.d]. A first treatment head assembly, detachably connected to the drive shaft, has a center of gravity located in rest at a coordinate [x.sub.t1, y.sub.t1, z.sub.t1]. A secondary mass element, spring-mounted at the support for essentially linear oscillating motion along the first longitudinal direction, has a center of gravity located in rest at a coordinate [x.sub.m, y.sub.m, z.sub.m]. At least the coordinate [x.sub.a, y.sub.a, z.sub.a] of the center of gravity of the armature has an offset in at least one of the y-direction and z-direction with respect to the coordinate [x.sub.d, y.sub.d, z.sub.d] of the center of gravity of the drive-shaft or with respect to the coordinate [x.sub.t1, y.sub.t1, z.sub.t1] of the center of gravity of the first treatment head assembly, i.e., y.sub.a≠y.sub.d and/or y.sub.a≠y.sub.t1 and/or z.sub.a≠z.sub.d and/or z.sub.a≠z.sub.t1; and the secondary mass element is configured such that the coordinate [x.sub.m, y.sub.m, z.sub.m] of the center of gravity of the secondary mass element is aligned with the coordinate [x.sub.j, y.sub.j, z.sub.j] of the joint center of gravity of the drive shaft, the first treatment head assembly and the armature in the at least one offset direction, i.e., y.sub.m=y.sub.j and z.sub.m=z.sub.j, so that a line connecting the coordinate [x.sub.m, y.sub.m, z.sub.m] of the center of gravity of the secondary mass element and the coordinate [x.sub.j, y.sub.jz.sub.j] of the joint center of gravity is parallel to or coincides with the x-axis.