Automatic toothbrushes are disclosed herein. A toothbrush configured in accordance with embodiments of the present technology can include, for example, a handle and a mouthguard coupled to the handle. The mouthguard can be configured to be positioned within a mouth of a user over multiple teeth of the user. A brush assembly having a plurality of bristles can be removably positioned within the mouthguard for engaging and cleaning the teeth of the user. A motor can be disposed within or coupled to the handle and configured to articulate the brush assembly within the mouthguard.

A cleaning device includes a bristle bundle and a handle. The handle has a tubular structure and includes a straight part and a bent part, and the bent part is located at the end of the straight part. The bristle bundle is detachably placed in the tubular structure of the handle, and one end of the bristle bundle extends out of the bent part.

An electrolytic brush assembly including a handle assembly; a shroud extending from the handle assembly, the shroud having an aperture at a distal end thereof; and a brush connecting assembly for releasably connecting a brush to the handle assembly whereby the brush extends through the aperture of the shroud. The handle assembly includes an adjustment sub-assembly for selectively moving the brush connecting assembly and a brush connected thereto relative to the handle assembly and the aperture of the shroud.

An electrolytic brush assembly including a handle assembly; a shroud extending from the handle assembly, the shroud having an aperture at a distal end thereof; and a brush connecting assembly for releasably connecting a brush to the handle assembly whereby the brush extends through the aperture of the shroud. The handle assembly includes an adjustment sub-assembly for selectively moving the brush connecting assembly and a brush connected thereto relative to the handle assembly and the aperture of the shroud.

A tri-position hairbrush includes a modular bristle-bed, having a plurality of bristles connected thereto; and a handle, connected to the modular bristle-bed. A switching unit operates to switch and convert the modular bristle-bed among three operational states. In a first operational state, which is a Closed State, the modular bristle-bed is arranged as a cylindrical structure that spans 330 to 360 degrees of curvature, and the hairbrush operates a round hairbrush. In a second operational state, which is a Semi-Open State, the modular bristle-bed is arranged as a curved cylinder-portion of 150 to 210 degrees of curvature, and the hairbrush operates as an open-curve hairbrush. In a third operational state, which is a Fully-Open State, the modular bristle-bed is arranged as a generally-flat surface, and the hairbrush operates as a paddle hairbrush.

A brush head assembly (100) comprising a sandwich assembly (200) comprising a flexible matrix (30) positioned between two layers of stiff or stiffer material (220), a plurality of bristle tufts (21), each of which comprises a plurality of bristle strands, each bristle tuft having a proximal end (23) and a free end (25), a bristle tuft retention element (250) for each bristle tuft (21), the bristle tuft retention elements (250) connecting the proximal end of the bristle tufts (21) to the sandwich assembly.

A brush head assembly (100) comprising a sandwich assembly (200) comprising a flexible matrix (30) positioned between two layers of stiff or stiffer material (220), a plurality of bristle tufts (21), each of which comprises a plurality of bristle strands, each bristle tuft having a proximal end (23) and a free end (25), a bristle tuft retention element (250) for each bristle tuft (21), the bristle tuft retention elements (250) connecting the proximal end of the bristle tufts (21) to the sandwich assembly.

A handle shaft has an upper end and a lower end. A cylindrical collar extends upwardly from the upper end of the handle shaft. The cylindrical collar has an open top. A brush head is formed of a plurality of elongated bristle fibers. The bristle fibers have lower ends secured in the open top of the cylindrical collar. The bristle fibers have free upper ends and a middle section. A ferrule assembly is axially reciprocable upon the cylindrical collar between a cleaning lower position and a raised position for cosmetic product application. The ferrule assembly is in sliding contact with the cylindrical collar. The ferrule assembly has a lower end and an upper end. The upper end is of a reduced circumference for sliding contact with the bristle fibers.

A handle shaft has an upper end and a lower end. A cylindrical collar extends upwardly from the upper end of the handle shaft. The cylindrical collar has an open top. A brush head is formed of a plurality of elongated bristle fibers. The bristle fibers have lower ends secured in the open top of the cylindrical collar. The bristle fibers have free upper ends and a middle section. A ferrule assembly is axially reciprocable upon the cylindrical collar between a cleaning lower position and a raised position for cosmetic product application. The ferrule assembly is in sliding contact with the cylindrical collar. The ferrule assembly has a lower end and an upper end. The upper end is of a reduced circumference for sliding contact with the bristle fibers.

A toothbrush closely fitted to the teeth, comprising: a toothbrush main body, a bristle tuft hole is provided on a head of the toothbrush main body; a bristle tuft assembly, movably arranged in the bristle tuft hole; a spring assembly, the bristle tuft assembly is connected with the toothbrush main body through the spring assembly. This toothbrush skillfully is configured with spring assemblies, based upon the contact between the elastic body and the bristle tuft assembly, to realize the flexible movement and elastic body force driving of the bristle tuft, making every bristle tuft independently move upward and downward according to the surface and structure of teeth, achieving the benefit of effective cleaning, durable usage, simple structure and low manufacturing costs.