| 摘要 |
PROBLEM TO BE SOLVED: To provide satisfactory operability by positioning the contact part of a spring for hold/conduction in a holder for guiding the rod-shaped main body of antenna at the opening part of a holder body. SOLUTION: This expansion antenna is provided with the rod-shaped main body of antenna and a holder 20 for guiding the main body of antenna. The holder 20 is composed of a cylindrical holder body 21 and a cantilever type spring 22 for hold/conduction. Inside a guide hole 21A on the holder body 21, plural springs 22 are arranged while surrounding the guide hole 21A. A contact part 22a of each spring 22 is positioned in an opening part 21o of the guide hole 21A. At the time of pulling out the main body of antenna, since the springs 22 are elastically deformed, a frictional force between the holder body 21 and a top plug is relaxed and the main body of antenna can be easily pulled out of the holder 20.
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