Electronic Disk-Type Horn And Horn Using Photointerrupter

A horn using an interrupter, the horn generating a sound by repeating an operation in which current flows through a coil wound around an iron core, the iron core is magnetized, and an armature is then attracted, comprising:

• a light blocking panel for blocking a light emitting device and a light receiving device to prevent light emitted from the light emitting device from reaching the light receiving device;
• a switch circuit for selectively supplying current to the coil;
• and
• a photointerrupter including the light emitting device and the light receiving device, the photointerrupter controlling the switch circuit in such a way that, when the light emitted from the light emitting device reaches the light receiving device, the switch circuit is turned on, whereas when the light blocking panel is interposed between the light emitting device and the light receiving device, and the light emitted from the light emitting device is blocked by the light blocking panel in order to prevent the light from reaching the light receiving device, the switch circuit is turned off.