| 摘要 |
PROBLEM TO BE SOLVED: To provide a multi-stage accommodation type flexible antenna, in which tensile strength in a first element where dense winding coil is provided inside is improved. SOLUTION: The multi-stage accommodation type antenna comprises first and second elements 30 and 31. The first element 30 comprises a long and cylindrical mold stopper 33 that is arranged in a case, while being accommodated freely, and a densely wound coil 32 that is provided in close contact with the inside of the mold stopper 33. The second element 1 is incorporated into the first element 30 while being slid freely. The mold stopper 33 covers an entire circumference including the tip portion of the densely wound coil 32 for avoiding expansion, and at the same time a multi-stage section 38 where thickness in the tip site is increased so that the second element 31 does not come out is provided.
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