| 摘要 |
A retarding device is to be used in an exerciser and includes a tubular housing which has an open top end and an intermediate part that is provided with an inwardly projecting annular support, and a tubular adjustment unit which is mounted on the open top end and which is movable axially relative to the tubular housing. A drive shaft extends axially into the tubular housing through a closed top of the adjustment unit and through the annular support. The drive shaft is movable axially in the tubular housing. A tubular rubber friction unit is provided in the tubular housing around the drive shaft and is interposed between the closed top of the adjustment unit and the annular support. Axial movement of the adjustment unit toward the tubular housing results in a compression force on the friction unit, thereby deforming the friction unit such that at least a part of an inner wall surface of the friction unit projects radially inward to contact the drive shaft so as to resist axial movement of the drive shaft in the tubular housing.
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