| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a heat ray sensing type automatic switch assuring an excellent performance capable of setting a wide sensing region using a simple wiring, not requiring extra wiring, and allowing anybody to mount it easily. SOLUTION: A master unit and a sub-unit are connected together through a two-wire type signal line, and the heat ray emitted by a human body, etc., is sensed by heat ray sensors installed on the master unit and sub-unit, and thereupon the light-up and put-off of an illumination load are controlled. Owing to this configuration in which a pair of hitching plug blades 2 are installed protrusively on the oversurface of the case 1 of master unit and sub-unit and a hitch type power outlet to receive the plug blades is formed on the undersurface of the case 1, it is merely required to couple the plug blades 2 with a hitch type ceiling rosette 5 fixed to the ceiling surface and couple a hitch plug provided on the illumination load with the power outlet 15.</p> |
