Electric toothbrush with single brush head

The utility model relates to an electric toothbrush which is especially suitable for an electric toothbrush with a single brush head. The electric toothbrush comprises a brush head with brush hair, a brush frame shell, a ball-shaped slipper block, an eccentric wheel and an anti-loosening bearing. The electric toothbrush is characterized in that the brush frame shell is connected with the brush head and the anti-loosening bearing in a blocking and tightly-matching way; the ball-shaped slipper block is connected with the eccentric wheel in an inserting way. The bottom of the brush head is provided with a grab; a position matching with the brush head on the brush frame shell is also provided with a grab; the outer edge of the anti-loosening bearing is provided with a circle of bulge, and the same position on the brush frame shell matching with the anti-loosening bearing is provided with a circle of groove; the eccentric wheel is processed by adopting injection molding and is provided with three eccentric small h