| 摘要 |
A lie-down massager comprises a frame, a rider below a top panel of the frame, a guide member engaged between the frame and the rider to allow a horizontal reciprocation to the rider, and a lifter carrying massage bumps. A gear unit includes a bolt gear downwardly extending from the lifter, a nut type gear having a outer periphery, a first gear incorporated on the periphery, and a second gear engaged to the first gear. The bolt gear is releasably engaged in the nut type gear whose bottom end is rotatably attached to and supported by the rider, whereby the second gear rotation generates the first gear rotation and the subsequent rotation of the nut type gear enables the lifter to make a vertical reciprocation by he releasable engagement of the bolt gear and the nut type gear.
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