An electric toothbrush head includes a brush body. The brush body includes an insertion cavity and a plug-in unit inserted into the insertion cavity. The plug-in unit includes a friction arm and an elastic arm cooperatively forming a pressing channel therebetween. The elastic arm has a bending section with a pressing surface facing the pressing channel. The friction arm has a convex section with a friction surface facing the pressing channel. The pressing surface and a concave-convex structure of the convex section press opposite sides of a vibration unit to fix the vibration unit in the pressing channel. The convex section has a concave surface facing an inner side wall of the insertion cavity, with a curved interval formed between the concave surface and the inner side wall. An elastic rubber block is filled in the curved interval and the elastic rubber block abuts against the inner side wall.

A system is provided. The system comprises an image projection device (6) configured to project display information; a wearable or hand-held device (100) which when worn is subjected to spatial movement; and a compensation element (7) configured to adjust the image projection device (6) based on the spatial movement such that the movement of the wearable or hand-held device (100) is compensated for during projection of the display information by the image projection device (6). Further, a method of spatially stabilizing display information projected by an image projection device (6) upon operation of a wearable or hand-held device is provided.

The present disclosure provides a brushhead for an power toothbrush detachably attached to a handle of the power toothbrush, the handle including a vibrating drive shaft, the brushhead comprising: a main body defining a receiving cavity which is configured to receive at least a portion of the vibrating driving shaft, the main body including a cavity wall substantially surrounding the receiving cavity and an end connected to the handle, with an opening which is defined in the end of the main body in air communication with the receiving cavity, so that the vibrating driving shaft is capable of being inserted into the receiving cavity through the opening; and an engaging assembly mounted in a side wall of the main body, the engaging assembly comprising an elastic member, which is made by metal material; wherein, a recess is defined in the outer surface of the side wall, the elastic member is deformably received in the recess, the elastic member is elastically deformed by force provided from the vibrating drive shaft when the brushhead is attached to the handle of the power toothbrush.

An oral cleaning device includes a head portion, RF electrodes located on the head portion and a non-conductive barrier located on the head portion that separates the electrodes from each other. The electrodes, bristles (if included) and the non-conductive barrier are mounted on a base and the base is arranged for either vibratory or rotational motion.

A handle for an electrically operated personal-care implement comprises a housing having an inner cavity, a proximal end and a distal end, a pressure sensor comprising a pivot lever accommodated within the inner cavity, a motor comprising an eccentric weight, wherein the pivot lever is attached to the proximal end of the housing via a pivot axis, the pivot lever extending with a distal end towards the distal end of the housing, and wherein the motor is attached to the distal end of the pivot lever.

A handle for a personal-care implement comprises a housing having an inner cavity, the housing having a proximal end closest to a head repeatably attachable to and detachable from the handle, and a distal end, the distal end being opposite the proximal end; a swivel-mounted connector-pressure-sensor unit unitarily made as one piece, the connector-pressure sensor unit comprising a connector extending through an opening at the proximal end of the housing, and a pivot lever accommodated within the inner cavity of the housing and extending towards the distal end of the housing, the pivot lever being attached to the housing via a pivot axis.

A unit for a handle of a personal-care implement is provided, the unit comprising a housing having a proximal end closest to a head being repeatably attachable to and detachable from the handle, and a light indication and sealing element, the light indication and sealing element comprising a ring structure and an elastic circular section, the ring structure being connected to the housing at the proximal end by two flexure hinges thereby creating a circular gap between the ring structure and the housing, the circular gap being filled with a transparent and/or translucent soft elastomeric material, the transparent and/or translucent soft elastomeric material forming the elastic circular section to seal the ring structure and the housing in a substantially water-tight manner.

A handle for an electrically operated personal-care implement comprises a housing defining an inner cavity accommodating a power source and a motor comprising an eccentric weight for operating the personal-care implement. The motor is mounted on a swivel-mounted carrier. The housing has a longitudinal extension and a substantially circular cross-sectional area extending substantially perpendicular to the longitudinal extension and having a diameter from about 12 mm to about 20 mm, more specifically from about 13 mm to about 17 mm, and even more specifically about 15 mm.

A method of monitoring brushing of a tooth and gum surface includes sensing a brushing relative to the tooth surface during a brushing session and generating feedback in response to the brushing. In one embodiment, feedback is generated when a user, such as a child, starts brushing. In another embodiment, feedback is generated when the brushing technique deviates from a correct brushing technique, such as the Bass Technique. When a user uses a correct brushing technique, the bristles on the brush head of a tooth brush vibrate. When the user uses an incorrect brushing technique, the vibrations stop, alerting the user that her technique is incorrect. The user can be alerted about improper brushing techniques in other ways, such as by generating audible sounds such as chirps, interrupting audio signals such as music, generating flashing lights, or the like. Preferably, a user's brushing technique can be tracked for later evaluation.

Described herein are systems and methods for providing personalized oral care. A system for oral care comprises an oral insert. The oral insert is sized and shaped according to a user's oral cavity, and has a plurality of fluid nozzles and an effluence conduit to channel fluid out of the user's oral cavity. Pressurized fluid provided through the nozzles are directed to, for example, the interproximal spaces between the user's teeth. In some variations, a system comprises an oral insert and an elastomeric substrate that is attached to the oral insert. In some variations, the elastomeric substrate comprises a textured surface vibrates and/or mechanically agitates and/or translates along the surface of the user's teeth. In some variations, a system for oral care comprises a microbiome collection chamber. Some variations comprise dental shim devices that are used for acquiring oral structure data and alignment between the upper and lower arches.