| 摘要 |
PURPOSE: An automatic withdrawal device of an elastic antenna using coupling power feeding is provided to perform automatically an inserting operation or a withdrawing operation of a whip by installing a small-sized motor and a gear within a telephone case. CONSTITUTION: An automatic withdrawal device of an elastic antenna using coupling power feeding comprises a helical(31), a metal sleeve(32), a cover(34), a whip(33), a tube(35), and a driving portion(37,38). The helical is formed on a predetermined dielectric. The metal sleeve performs the power feeding of an antenna. The cover protects an assembly of the helical and the metal sleeve. The whip penetrates the assembly of the helical and the metal sleeve. The tube is installed between the sleeve and the whip in order to cover the whip. The driving portion moves the whip.
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