ADJUSTING MECHANISM FOR ALARM DEVICE

摘要

PROBLEM TO BE SOLVED: To displace the same detecting zone even when an alarm device incorporated with two optical system units is used by being attached to a ceiling or a wall. SOLUTION: Pins 6a, 7a are provided in an optical system unit 1a and pins 6b, 7b are provided in an optical system unit 1b. This adjusting mechanism is rotated by coupling pins of both units to grooves of a groove cum disk 3 supported by a shaft 3c located at the center of both units. Switching of the alarm device when it is attached to the ceiling and the wall is completed by a series of rotating operation and motions of both units at each attaching state are equalized with each other.