| 摘要 |
A telescopic antenna is provided to increase electrical length of the antenna with equally maintaining the entire size of the antenna and have high durability even when using a wire-shaped antenna conductor. A first hollow antenna conductor(10) has a first outer diameter. A second hollow antenna conductor(20) has a first inner diameter larger than the first outer diameter and a bending unit(22) bent at one end to have a second inner diameter smaller than the first inner diameter but larger than the first outer diameter. A stopper(30) is inserted into the first antenna conductor, and a convex unit(32), which has an outer diameter larger than the first outer diameter and the second inner diameter but smaller than the first inner diameter, is formed in the remaining part other than the part inserted into the first antenna conductor. A fixing unit(14) is arranged on an outer periphery of the first antenna conductor and has an outer diameter smaller than the first inner diameter but larger than the second inner diameter. An elastic body(40) is fixed by the fixing unit and the convex unit and has elasticity in one direction. The first antenna conductor, the stopper, and the fixing unit are movably inserted into the second antenna conductor. The fixing unit and the bending unit restrict movement of the second antenna conductor with respect to the first antenna conductor.
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