Driving apparatus for motor-driven telescopic antenna

摘要

A driving apparatus for a motor-driven telescopic antenna including a rotary force transmitting mechanism installed between a drive side component rotated by a motor and a driven side component that extends and retracts an antenna element when rotated. The rotary force transmitting mechanism includes two coil springs provided circumferentially on the drive side component and two ridges formed with a space in between on the driven side component circumferentially so that when the drive and driven side components are rotated the ridges pushes the two springs to make compression deformations successively.