MOTOR ROTARY TYPE TOOTHBRUSH AND TOOTH GERM MASSAGE APPARATUS WITH FREELY DETACHABLE BRUSH HEAD

摘要

Brush 20 is carried by stem 16 and rotated about the axis of the stem by the shaft 13 of a motor M which is reversible by operation of switch S. The stem 16 is detachably coupled to the shaft 13 by a radial tongue on the shaft engaging a slot in the stem and by bosses 14 engaging recesses 19. An arcuate shield 21 is rotatably mounted on the stem 16 to cover part of the brush circumference. The shield 21 is held stationary by contact with the mouth or tongue while the brush rotates.