| 摘要 |
PROBLEM TO BE SOLVED: To provide a siren device capable of carrying audible alarm over a wide area.SOLUTION: A siren device comprises a device main body 2 which outputs audible alarm, a lower horn pipe 3 which has one end connected to a side face of the device main body 2 and carries audible alarm from the device main body 2, an upper horn pipe 4 which is connected freely rotatably around an axial center at the other end of the lower horn pipe 3 and carries audible alarm from the lower horn pipe 3, a horn 5 which is provided at a free end of the upper horn pipe 4 and directed in a horizontal direction and a rotation unit 6 which rotates the upper horn pipe 4 around a vertical axis and rotates the horn 5 in a horizontal plane.SELECTED DRAWING: Figure 1 |
