Patent ID: 7135004

Claim:
A rotary massaging stick comprising: a transmission mechanism, said transmission mechanism comprising a motor, said motor having an output shaft and a pinion fixedly mounted on said output shaft, a plurality of circular mounting plates fastened to a shell of said motor at different elevations with spacer tubes and screw bolts, a stepped gear (A) meshed with said pinion, a stepped gear (B) fixedly connected in parallel to said stepped gear (A), a stepped gear (C) meshed with said stepped gear (A) and said stepped gear (B), a sleeve rotatably mounted in one said circular mounting plate, a first transmission gear fixedly mounted on said sleeve and meshed with said stepped gear (B), a transmission shaft inserted through said sleeve, a second transmission gear fixedly mounted on a bottom end of said transmission shaft, and a stepped gear (D) meshed between said second transmission gear and said stepped gear (B); a controller accommodating said transmission mechanism for controlling operation of said motor; a flexible conical cap capped on one end of said transmission shaft remote from said controller; and a plurality of massaging ball assemblies fastened to said sleeve and said transmission shaft and spaced between said controller and said flexible conical cap, each said massaging ball unit comprising a holder base, two locating devices, and a plurality of massaging balls, said holder base comprising a flat circular plate member, a center bar extended through the center of the circular plate member, two female screws arranged in parallel to said center bar at two sides, a plurality of pins symmetrically perpendicularly provided at top and bottom sides of said flat circular plate member and equiangularly spaced around the border of said flat circular plate member for supporting said massaging balls, said center bar comprising a center axle hole axially extended through two distal ends thereof, and two peripherally serrated engagement blocks fixedly provided at the two distal ends around said center axle hole, said locating devices being fastened to said female screws by screws, each said locating device comprising a center coupling hole respectively coupled to the peripherally serrated engagement blocks of said holder base and a plurality of pins respectively inserted into said massaging balls to hold said massaging balls on the pins of said holder base.