A dental cleaning appliance includes a handle; an electronic display, and a control circuit for activating the display. The handle includes a body and a transparent panel connected to the body. The panel defines a trough-shaped recess beneath which the display is located.

The invention relates to an electric toothbrush handle and an electric toothbrush. The electric toothbrush handle comprises: a shell in the inner cavity of which at least one light emitting element is arranged; and a display interface arranged on the outer side of the shell and covering the light emitting element; wherein the display interface is provided with a mark in a set shape at a position corresponding to each light emitting element; the light of the light emitting element is capable of penetrating through the display interface so that the mark is visible. With the mark formed on the display interface, the machining process of the electric toothbrush handle is simplified, and the electric toothbrush with the electric toothbrush handle can effectively prevent water ingress.

An oral care system that includes an oral care implement and a tracking attachment. The oral care implement may include a handle and a head. The tracking attachment is detachably coupled to the oral care implement. The tracking attachment may include a first component comprising a first housing having an inner surface that defines a first cavity and a second component comprising a second housing having an inner surface that defines a second cavity. When the tracking attachment is coupled to the oral care implement, a first portion of the handle is positioned within the first cavity and a second portion of the handle is positioned within the second cavity.

A molding device for manufacturing a plastic hollow part by injection molding includes an injection nozzle and first and second molding stations. Each molding station has a first mold including two mold halves forming, respectively, first and second mold cavities, and a core having a first end, which can be at least partially located inside the first and second mold cavities. A first stripper can be arranged on the core in a passive position, spaced from the first end of the core at a first distance; in a molding position, spaced from the first end of the core at a second distance; and in a demolding position, spaced from the first end of the core at a third distance; wherein the first distance is greater than the second distance, and the second distance is greater than the third distance.

A toothbrush including a chassis assembly, an output shaft configured to connect to a brush head and extending at least in part through a portion of the chassis assembly, a power train assembly operably connect to the output shaft, where the power train assembly oscillates the output shaft. The toothbrush also includes a fluid connector operably coupled to the chassis assembly and fluidly coupled to the output shaft via the power train assembly. The fluid connector rotates 360 degrees relative to the chassis assembly.

A tracking attachment for an oral care implement that includes a housing and a tracking unit configured to track position, orientation, or movement of the oral care implement. The housing may define a receiving cavity that is configured to receive a portion of the oral care implement. The housing may include a first housing portion having an inner surface that defines a first portion of the receiving cavity that is open at both of the first and second ends of the first housing portion and a second housing portion that mates with the first housing portion to detachably couple the second housing portion to the first housing portion. The second housing portion may have an inner surface that defines a second portion of the receiving cavity that is open at the second end of the second housing portion.

Provided is a light irradiated toothbrush, in which light sources, irradiating light having mutually different wavelengths, are arranged in alternation at the bottom of waveguide bristles so that light of different wavelengths give rise to constructive interference which strengthens the intensity of the irradiated light, and the height of the light sources are varied on the basis of the wavelength of the light irradiated therefrom so as to effectively transmit light of short wavelengths to the waveguide bristles, and light having mutually different wavelengths are transmitted by means of the waveguide bristles, thereby effectively transmitting the light to the mouth of a user.

Gag reflex when a mouthpiece of an oral care device contacts the posterior oral cavity is reduced by provision of a projection on the handpiece that contacts the user's skin in such a way that gag reflex is reduced or eliminated due to stimulation of nerves in the user's face. In an embodiment, the projection has a tip that contacts the user's face on or near the groove between the lower lip and the chin, exerting mechanical pressure, vibration, or electrical stimulation, which stimulates nerves to reduce the gag reflex.

A replaceable brush head includes an upper surface, an outer perimeter edge, and a plurality of tufts. The upper surface includes a plurality of bristle tufts. The lower surface includes an outwardly extending knock-out button. The outer perimeter edge includes at least one protrusion. The replaceable brush head may be installed in a toothbrush body that includes a head portion having a recess sized to fit the replaceable brush head with a knock-out opening for the knock-out button and at least one channel for coupling to the at least one protrusion. The replaceable brush head can be removed from the toothbrush assembly by applying a force to the knock-out button in the direction of the tuft plate.

An oral care implement handle (200) having a gripping portion (210) and an oral care refill head (300) that is detachably coupled thereto. The oral care implement handle (200) may include the gripping portion (210) and a rocker unit (400) which includes a stem (250), a motor (224), and a motor chassis (410). The rocker unit (400) may be pivotably mounted within the gripping portion (210) so that upon pressure being applied an oral care refill head (300) which is coupled to the stem (250) that exceeds a pressure threshold, the rocker unit (400) may be altered from a normal position to an excessive pressure position. When in the excessive pressure position, the rocker unit (400) may actuate an actuator element (265) of a control unit (260) to initiate generation of a user perceptible signal.