Patent ID: 8737660

Claim:
An electric horn, comprising: an exciting coil that is housed in a bottom part of a closed-end tubular casing, the exciting coil having a wire-wound portion formed by winding a wire around an outer peripheral side of a tubular part of a coil bobbin; a fixed iron core that is fit to be fixed into an inner peripheral side of the tubular part, the fixed iron core being magnetized according to excitation of the exciting coil; a diaphragm that is fixed to an open end of the casing; and a movable iron core that is provided to a shaft center part of the diaphragm, the movable iron core and the fixed iron core being placed to axially face each other, wherein: a suction position that is set as the position where the movable iron core is the closest to the end face of the fixed iron core, a spaced position that is set as the position where the movable iron core is farthest to the end face of the fixed iron core, a reference position that is set by an end part, relative to a side of the movable iron core, of the wire-wound portion of the exciting coil, wherein the suction position is closer to the end of the fixed iron core than the reference position, the spaced position is farther from the end of the fixed iron core than the reference position, the movable iron core moves toward the suction position as the fixed iron core being magnetized by excitation of the exciting coil with connecting a power supply, the movable iron core moves away from the fixed iron core toward the spaced position as the fixed iron core being demagnetized by disruption of the exciting coil with disconnecting the power supply, and a warning sound is generated by the movable iron core moving repeatedly between the suction position and the spaced position over the reference position with a predetermined amplitude range.