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 care system comprising: a. an electrical motor b. a base assembly comprising: i. an elongated base-assembly main body defining an elongate axis; and/or ii. a battery or a battery compartment optionally including electrical contacts for a battery, the battery and/or the battery compartment being electrically wired to the electrical motor; and c. a head assembly is disclosed herein. Methods and kits are also disclosed.

An oral care system comprising: a. an electrical motor b. a base assembly comprising: i. an elongated base-assembly main body defining an elongate axis; and/or ii. a battery or a battery compartment optionally including electrical contacts for a battery, the battery and/or the battery compartment being electrically wired to the electrical motor; and c. a head assembly is disclosed herein. Methods and kits are also disclosed.

A head structure of a brush appliance comprises a frame movably connected with a head driving shaft, driving bristle retainers connected with and driven by the head driving shaft, and driven bristle retainers which and the driving bristle retainers are alternatively arranged with each other. In the head structure, the driven bristle retainers are driven by the driving bristle retainers from the frame in a constrained mode and move around a respective motion axis. The driving bristle retainers have protrusions. The driven bristle retainers have bevel surfaces which correspondingly cooperate with the protrusions. At least one driven point on at least one of bevel surfaces is closer to the driving bristle retainers than a contact point or a contact line or a contact surface of the at least bevel surface and the corresponding protrusions. Thereby the driven bristle retainers are driven by the driving bristle retainers in the moving process.

An ultrasound applicator having spatially extended functionality to treat various oral and dental diseases. The applicator incorporates a multi directional ultrasound transducer system, which spatially irradiates the oral cavity with ultrasonic pressure waves, operational to simultaneously treat and destroy disease causing bacteria and bacterial chains on the gums and the inside surfaces of cheeks and lips, providing relief from Gingivitis, Recurring Aphthous Stomatitis, Lichen Planus, and Mucositis. A motorized version featuring sonic frequency orbital vibration of the applicator is described.

An electrical appliance for personal care includes a handle with a longitudinal axis, and a plug-on part which can be attached to the handle, wherein a vibration unit having an electric motor and an eccentric element is arranged in the handle, wherein a plug-like coupling structure protrudes from the handle, which plug-like coupling structure forms an interface with a substantially mirror-inverted socket-like coupling structure of the plug-on part, wherein the interface has at least two stages with different circumferential geometry, wherein at least one of the stages has a rotation-preventing device between the handle and the plug-on part, and wherein a stop surface of the handle for the plug-on part extends obliquely with respect to the longitudinal axis of the handle.

A linear motor is disclosed. The linear motor includes an armature mounted for driven linear oscillation substantially along a longitudinal direction; a secondary mass mounted for linear oscillation substantially along the longitudinal direction; and a coupling unit for coupling the armature and the secondary mass. The coupling unit includes at least two coupling spring assemblies and at least a coupling element, the coupling spring assemblies being arranged in planes perpendicular to the longitudinal direction and being spaced apart from each other, and the coupling element being fixedly connected with the coupling spring assemblies.

Hands-free systems, devices and methods, adapted for brushing, cleaning and treating all of a user's teeth simultaneously, are provided. In some embodiments, such a device comprises brushes for cleaning all of a user's teeth simultaneously. In some embodiments, such a device includes a generally U-shaped channel(s), accepting, cleaning and/or treating all of a user's teeth simultaneously. Customized fluid jets within such devices are provided, introducing dentifrices and other treatments into the channels. In some embodiments, compartments and cartridges with a proprietary form factor for delivering dentifrice and other treatments and for disposing of waste without mess are provided. In some embodiments, data are gathered, analyzed and serve as the basis for a treatment plan, which may then be carried out by the system(s), device(s) and method(s), over time.

A refill head (100), and oral care implement incorporating the same, wherein the refill head (100) can be uncoupled from a stem (220) of a handle (200) by withdrawing the refill head (100) from the stem of a handle (200) along the longitudinal axis of the oral care implement, which results in locking members (134) on the refill head (100) disengaging from an engagement rib (230) on the stem (220). The locking members (134) and engagement rib (230) may be aligned with or angled relative to the longitudinal axis of the oral care implement. A portion of the stem may be visible through a portion of the refill head to reinforce the proper connection between the refill head and the handle.

A toothbrush has a handle and a treatment head mounted for movement relative to the handle against a spring force when a treatment force is applied in at least one treatment direction onto the treatment head. A treatment force measurement unit for determining the applied treatment force includes a capacitive force senor having a first electrode fixedly mounted with respect to the handle and a second electrode mounted at a distance from the first electrode. The second electrode is movably mounted with respect to the handle. A spring unit is arranged between the first and the second electrode. A control circuit determines at least one parameter indicative of the capacitance between the first and second electrodes, wherein the second electrode is mechanically coupled with the treatment head and is arranged to be moved relative to the first electrode when the treatment force is applied at the treatment head.