| 摘要 |
PURPOSE:To allow the position to be known easily by mounting a power control switch having a power control means on the inside of a door, sensing its being locked or unlocked, and generating electric waves. CONSTITUTION:When a door 1 is unlocked for any person to come into a room and the door lock 2 is put in a specified position, the light 5 emitted from a power control switch 3 is sensed by a light reflecting part 6 to know that the lock 2 is disengaged. When this switch 3 transmits electric wave 7 to instruct turning-on of the electric power and it is received by an electric wave reception and illumination switch control device 4, the illumination 8 is lighted up. When the person goes out of the room and the door 1 is locked, the lock 2 is put in the position where the light 5 is blocked, and when the switch 3 senses engagement of the lock 2, an electric wave 7 is transmitted to instruct shutoff of the power, and the illumination 8 will go out. Because the illumination 8 is lighted up and turned off according to the locking and unlocking of the door 1, illuminating inside the room can be made easily. |
