Patent ID: 6364850
Filing Date: 2002-04-02
Classification: A61H

Abstract:
A massage device comprising:a hollow casing with two opposite lateral sides; a drive shaft disposed uprightly in said hollow casing and rotatable axially in opposite first and second directions; parallel upper and lower output shafts disposed transversely in said hollow casing, each of said output shafts having two opposite end portions that extend out of said hollow casing and that are disposed respectively on said lateral sides of said hollow casing; an upper gear set which includes an upper drive gear sleeved rigidly on said drive shaft so as to be co-rotatable with said drive shaft in the first and second directions, and an upper driven gear meshing with said upper drive gear and connected rigidly to said upper output shaft so as to permit rotation of said upper output shaft together with said drive shaft when said drive shaft rotates in each of the first and second directions; a lower gear set which includes a lower drive gear disposed coaxially on said drive shaft below said upper drive gear, and a lower driven gear meshing with said lower drive gear and connected rigidly to said lower output shaft; a unidirectional bearing provided on said drive shaft and disposed between said drive shaft and said lower drive gear, said unidirectional bearing preventing rotation of said drive shaft from being transmitted to said lower output shaft when said drive shaft rotates in the first direction, said unidirectional bearing permitting rotation of said drive shaft to be transmitted to said lower output shaft via said lower gear set when said drive shaft rotates in the second direction; a pair of linkage units disposed respectively on said lateral sides of said hollow casing and mounted on said end portions of said upper and lower output shafts; and a pair of massaging wheels mounted respectively on said linkage units.