| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a receive antenna which can favorably keep the directional characteristic and which is costless and improves the appearance, by forming a receive antenna by the support of a sun visor.. SOLUTION: The horizontal part 22 of the support 20 of a sun visor S is positioned parallelly to the upper edge of the front window shield and horizontally, in the condition that a driver has gotten out of a car. The receiving directional characteristic of the receive antenna is always kept in the same state. In this time, the support 20 is kept in an easily visible position from the outside of the car. The support 20 is made of a metallic flange to sufficiently satisfy the electrical conductivity as a receive antenna. Accordingly, radio waves are securely received by the antenna to output to a receiver through a coaxial cable 62. Then, a car door is locked or unlocked through a motor by a control circuit. In this way, it is not necessary to install an antenna separately and hence, the cost is reduced.</p> |
