Patent ID: 7857240

Claim:
A rotary shower head comprising an outer case which houses an universal joint, an inner case assembly, a driving mechanism and a water discharge disc, wherein: the outer case has a housing chamber and an opening at a top end thereof; the universal joint includes a cap and a ball seat; the inner case assembly holds the driving mechanism and has an upper case and a lower case, the upper case having a coupling portion at one end to hold the ball seat, the coupling portion having at least one diagonal hole and a first axle hole at the bottom thereof; the driving mechanism includes: a rotary disc which has a first gear shaft extended form the center of the bottom thereof and a plurality of vanes; an upper lid having a third axle hole; a first speed-reducing set which has a first bottom disc and a plurality of first gears, the first bottom disc having a second gear shaft extended downwards from the center of the bottom thereof; a second speed-reducing set which has a second bottom disc and a plurality of second gears, the second bottom disc having a third gear shaft extended downwards from the center of the bottom thereof; a seat which has a housing space to hold the first and second speed-reducing sets, and a boss at the bottom thereof; a rotary head which has a coupling trough in the center and an annular base which has at least one ridge formed on the perimeter thereof; and an axle; the water discharge disc includes: a pad which has a hole in the center and a plurality of water discharge struts each having a water outlet running through; a face disc which has an anchor boss in the center and a plurality of coupling holes mating the water discharge struts; and a bottom seat which has a disc and a transmission portion in the center of the disc, the transmission portion having a plurality of annular latch grooves inside latched by the ridge of the rotary head to form chain movement.