US Patent 7784372 Drive mechanism for massaging device

A driving mechanism for a massaging device includes a housing, a driven gear rotatably mounted in the housing, a driven shaft secured to a first side of the driven gear, and an adjusting shaft mounted on a second side of the driven gear. Thus, when the driven gear is rotatable in a first direction, the adjusting shaft and the driven shaft are rotated with the driven gear simultaneously, so that the two swinging members are moved in the same direction, and when the driven gear is rotatable in a second direction, the adjusting shaft and the driven shaft are rotated with the driven gear with a time lag, so that the two swinging members are moved in the opposite direction.