| 摘要 |
<p>PURPOSE:To switch the reporting sound interlockingly with the switching action of the detection range by providing a switching means controlling the action of a driving means in conjunction with the switching action of the detection range of a human body detecting means. CONSTITUTION:When a selector switch 7 is operated in the direction of an arrow B, a switch side contact 10 is brought into contact with a circuit side contact 12, a moving plate 4 is moved in the direction of an arrow D, and the detection range of an infrared sensor 1 is narrowed. A readout control circuit 17 receives the output from a selecting circuit 15 and sets the mode to the guest mode. When the infrared sensor 1 generates the output at the preset level or above, a detecting circuit 16 judges that a human body exists in the detection range and outputs a human body detection signal to the readout control circuit 17. The guest report data of a memory circuit 18 are read out, outputted to a D/A converting circuit 19, and amplified by an amplifier 20, then the guest report sound is outputted from a speaker 21. When the selector switch 7 is operated in the direction of an arrow A, the detection range of the infrared sensor l is widened for the crime prevention mode, and a warning sound is outputted.</p> |
