ELECTRIC TOOTHBRUSH HEAD Russian patent published in 2025 - IPC A61C17/34 

FIELD: medical equipment.

SUBSTANCE: electric toothbrush head for use with an electric toothbrush handle comprises a brush rod, a swinging lever and a unit with bundles of bristles. Brush rod has the first central axis, is equipped with a cavity in the front end part and a mounting chamber passing from the rear end part to the front one and communicating with the body cavity along the first central axis. Unit with bundles of bristles is movably installed in the cavity, has the second central axis and is centred by aligning the second central axis in parallel or collinear with the first central axis. Swinging lever is installed in the mounting chamber and is connected to the unit with bundles of bristles. Brush rod is equipped with a vertically passing rotating shaft in the middle of the lower part of the cavity, the lower part of the unit with bundles of bristles is equipped with a hole to ensure rotation around the axis when interacting with the rotating shaft. Bristle bundle unit has at least two guide projections on the side walls on both sides of the second central axis, the cavity opening is provided with a mounting groove corresponding to the guide projection after the bundle unit with the bundles is deflected by at least a first angle from the first central axis, and the inner wall of the cavity of the housing is provided with a guide groove corresponding to the mounting slot and communicating with it, for sliding inside the guide protrusion to guide the bundle unit for movement upwards, downwards, to the left and to the right, wherein guide grooves on both sides of said first central axis extend in opposite directions. Rear end part of the unit with bundles of bristles is provided with a groove to provide vibrations, swinging arm front end is provided with a drive shaft extending into a groove to provide for oscillations, drive shaft is configured to drive the unit with bundles of bristles to the left and to the right by means of contact with the opposite inner walls of the groove to provide for oscillations. Maximum deflection angle of the swinging arm is less than the first angle.

EFFECT: providing reliability and stability of movement of the unit with bundles.

16 cl, 16 dwg