| 摘要 |
The invention relates to a directional antenna mechanism of a mobile radio tracking receiver, comprising four antenna elements (12), which are fastened by a pivot pin (14) to the body (10) of the radio tracking receiver. For the duration of the use, the antenna elements are turned to an operating position, in which they are pointed away from the body. After use, the antenna elements can be turned to a transport position, in which the antenna elements are placed inside the body in the direction of the longitudinal axis of the body. In the invention, at least two antenna elements are connected to each other by a mechanism in a way that moving the first antenna element to the operating position or the transport position also causes the second antenna element to move to the same position simultaneously. Preferably, all the antenna elements are connected to each other by a mechanism in a way that moving one antenna element to the operating position or the transport position causes all the antenna elements to move to a corresponding position simultaneously. The mechanism according to the invention comprises a movable transmission rod (16) arranged inside the body, with toothings (26) and toothed discs (22) fastened to the ends of the antenna elements, contacting to the toothings of the transmission rod. The transmission rod is moved either manually by a lever (28) fastened to the transmission rod or by an actuator, such as an electric motor, arranged inside the body. <IMAGE>
|
