Drive unit of a foot massage machine

A drive unit of a foot massage machine comprising:

• a housing having a motor inside thereof, an eccentric block being driven by a power output shaft of said motor and a laterally elongated groove;
• a frame disposed in front of said motor and situated inside of said housing, two shaft rods being parallel to each other at top and bottom thereof;
• and
• a slider assembly mounted on two shaft rods and driven by means that said motor brings said eccentric block in motion such that said slider assembly is shiftable leftward and rightward between two shaft rods of said frame, said slider assembly extending through said laterally elongated groove, a massage seat on which a foot rests being mounted thereon;
• characterized in that said slider assembly is provided with a longitudinal bar at center thereof, and that a crank is inserted on the outer rim of said longitudinal bar, and that said crank is T-shaped and includes a circular sleeve externally mounted on said longitudinal bar and a cylindrical slider serving as shaft and fixed at one side of said circular sleeve, and that said cylindrical slider is inserted into a mounting hole of said eccentric block, showing a sliding joint between a shaft and said mounting hole, and that when said eccentric block rotates with said power output shaft, said crank acts as a driven part and said circular sleeve moves upward and downward in said longitudinal bar, and that said driven slider assembly laterally shifts leftward and rightward on two shaft rods by means of the principle of the eccentric drive.