| 摘要 |
PURPOSE:To enable only a desired door to be selectively locked or unlocked discriminating a receiver by receiving a signal to only the specific receiver containing in its reception sensitivity area a space position corresponding to the space position where a transmitter is controlled. CONSTITUTION:The first and second receivers 12, 13 are arranged in such a manner that the respective light receiving axes 12a, 13a extend in a reverse direction to each other both right and left sidewards from a car body. The third receiver 14 is arranged in a manner wherein its light receiving axis 14a extends behind the car body in a direction orthogonal with the light receiving axes 12a, 13a. In this way, each receiver 12 to 14 is set respectively outside a driver's seat side door 2, assistant driver's seat side door 3 and a trunk lid 4 so that light receiving areas 26 to 28 able to well receive an infrared ray code signal from a transmitter 18 are prevented from interfering with each other. Accordingly, when the transmitter 16 is operated in any of the light receiving areas 26 to 28, the signal is received only to the corresponding specific receivers 12 to 14, so that a control unit 11 selects a desired door or the like, enabling it to be locked or unlocked. |
