| 摘要 |
An apparatus for electrically driving a retractable antenna comprises a motor, a worm gear attached to the driving shaft of the motor, a pair of worm wheels engaged with the worm gear, a pair of rollers for rotating in accordance with the rotation of the worm wheels to longitudinally transfer a rod antenna element, and a roller urging mechanism for urging the rollers against the outer periphery of the rod antenna element. The roller urging mechanism includes an arm provided in correspondence with at least one of the rollers such that the arm can rotate about its proximal end, and supporting the roller such that the roller can rotate about a distal end of the arm, and a spring for applying an urging force to the arm to urge the roller against the outer periphery of the antenna element.
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