| 摘要 |
PURPOSE:To cope with failure to switch off an indoor equipment by mounting a lock with an electric contact closed at the time of locking on a door while installing a timer and stopping energization into a room after a fixed time passes after locking. CONSTITUTION:A reed switch 8 closed at the time of locking is set up to a door lock 2, and a timer 9 is operated by the contact signal of the reed switch 8. A contact 14 is operated after the setting time of the timer 9, and indoor power supply lines L1, L2 are interrupted. Even when switches for illumination S1, air conditioning S2, ventilation S3 and other electrical equipments 6, 7 installed into a conference room, etc., fail to be turned off and the door 2 is locked, energization is stopped in a fixed time. A push-button switch is mounted on the outside of the door, the timer 9 is not operated even by locking when the button is depressed so that energization into the room is not stopped. Accordingly, dissipation power due to failure to turn switches off can be reduced. |
