| 摘要 |
A device for driving telescopic power antenna for vehicles including a drive cylinder connected to an antenna motor, a driven cylinder which is concentrical with the drive cylinder and controls the extension and retraction of the antenna when rotated by the drive cylinder, and a transmisson mechanism interposed between the drive an driven cylinders. The transmission mechanism includes a projection formed on the drive cylinder, a circular groove formed on the driven cylinder, a coil spring installed in a manner to expand and contract in the direction of the length of the groove, and a pair of arc shaped cores installed in the coil spring. The coil spring and the cores ae compressed by a specific displacement-pressure relationship when the projection moves along the groove and presses one end of the coil spring when a relative rotation occurs between the drive and driven cylinders.
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