| 摘要 |
In a massage device, a rotary drive shaft is disposed uprightly in a hollow casing. Parallel upper and lower output shafts are mounted transversely in the casing, and have opposite end portions that extend out of the casings. An upper gear set includes an upper drive gear sleeved rigidly on the drive shaft for co-rotation therewith, and an upper driven gear meshing with the upper drive gear and connected rigidly to the upper output shaft. A lower gear set includes a lower drive gear disposed coaxially on the drive shaft, and a lower driven gear meshing with the lower drive gear and connected rigidly to the lower output shaft. A unidirectional bearing is disposed between the drive shaft and the lower drive gear to prevent rotation of the drive shaft from being transmitted to the lower output shaft when the drive shaft rotates in a first direction, while permitting rotation of the drive shaft to be transmitted to the lower output shaft when the drive shaft rotates in a second direction opposite to the first direction. Two linkage units, disposed on the lateral sides of the casing, are mounted on the end portions of the output shafts and are provided with massaging wheels.
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