| 摘要 |
PROBLEM TO BE SOLVED: To provide a fire alarm device capable of reducing the transmission loss(loss) of mechanical energy, resulting in a high alarm effect.SOLUTION: A fire alarm device 10 includes: a casing 12; a rotor 16 positioned inside the casing 12, and capable of rotating around a shaft; a driving source 22 configured to drive the rotor 16 to rotate around the shaft; a striking part 26 configured to receive a centrifugal force accompanied by the rotation of the rotor 16, and to collide against the casing 12 for generating a collision noise; an engagement part 32 disposed in the rotor 16; and a hook part 34 configured to be engaged with the engagement part 32 for blocking the rotation of the rotor 16, and to, when its temperature becomes not lower than a predetermined temperature, release its engagement with the engagement part 32 for permitting the rotation of the rotor 16. |
