| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fire alarm for simply preventing the falling or artificial robbery of a fire alarm body due to an earthquake or the like as necessary. Ž<P>SOLUTION: A fire alarm (1), in which a fire alarm body (2) detachably mounted on a mounting base (3) installed on an installation surface is fixed to the mounting base by using the screwing structure of a lock screw (62) and a lock nut (63), is provided with: two holding walls (43) vertically erected from a back plate (17) of the fire alarm body, and configured to cover two end faces including the side face of the lock nut; a notch section (63) installed on the side board of the mounting base, and configured to involve the head of the lock screw; and a protrusion (44) installed at the upper end of the side of the holding wall with which the side near the side board of the mounting base among the crossing sides of the side face and end face of the lock nut is brought into contact. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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