| 摘要 |
A telescoping antenna assembly (12) has a tubular base (18) for securing to a wireless telephone handset (10) and an extendible mast (20) telescopically mounted on the tubular base (18) for movement between an extended position extending out of the tubular base (18) and a retracted position in which at least the majority of the mast is retracted within the tubular base (18). The tubular base (18) and mast (20) have mating inner and outer surfaces. On e of the mating surfaces has a helical groove (30, 31) extending along at least part fo its length, and the other cylindrical surface has at least one pin (28, 29) slidably engaged in the groove (30 ,31). The engagement of the pin (28, 29) in the helical groove (30, 31) causes the mast (20) to rotate relative to the base (18) in a first direction as the mast is moved from the retracted to the extended position, and in a second direction as the mast is moved from the extended to the retracted position, uncoiling and then recoiling the antenna feed line (24, 26) so as to reduce stretching and torque on the line.
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