| 摘要 |
When an operation such as opening or closing of a front flip cover or a k ey operation of communication-start or communication-end occurs, a controller acquires information for extraction or retraction of an antenna. Basing on the above information, the controller controls a motor driving by intermittently supplying motor driving signal by which the motor can rotate clockwise or counterclockwise during a preset tim e necessitated for fully extracting and retracting an antenna. While motor driving, if a blocking force applied to an antenna, the controller repeatedly stops supplying of the driving signals to the motor for a predetermined interval and then resumes supplying the signals. A gear unit is tightly coupled in a body with the motor, receives a rotating force from the motor shaft, and extracts and retracts an antenna. In addition, the re is further provided a fixing element for fixing the motor and the gear unit to an anten na housing, which is able to absorb external impact transferred to the motor and the gea r unit through an antenna and to absorb a vibration of the motor. When a front flip cover i s opened or a communication-start key is pushed by a user to use a wireless telephone, the antenna is automatically extracted from the antenna housing, while when the front flip cover is closed or a communication-end key is pushed, the antenna is automatically retracted into the antenna housing.
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